cc/surfaces/surface_hittest.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CC_SURFACES_SURFACE_HITTEST_H_
   6 #define CC_SURFACES_SURFACE_HITTEST_H_
   7
   8 #include <set>
   9
  10 #include "cc/surfaces/surface_id.h"
  11 #include "cc/surfaces/surfaces_export.h"
  12
  13 namespace gfx {
  14 class Point;
  15 class Transform;
  16 }
  17
  18 namespace cc {
  19 class DrawQuad;
  20 class QuadList;
  21 class RenderPass;
  22 class RenderPassId;
  23 class SurfaceManager;
  24
  25 // Performs a hittest in surface quads.
  26 class CC_SURFACES_EXPORT SurfaceHittest {
  27  public:
  28   explicit SurfaceHittest(SurfaceManager* manager);
  29   ~SurfaceHittest();
  30
  31   // Hittests against Surface with SurfaceId |surface_id|, return the contained
  32   // surface that the point is hitting and the |transformed_point| in the
  33   // surface space.
  34   SurfaceId GetTargetSurfaceAtPoint(SurfaceId surface_id,
  35                                     const gfx::Point& point,
  36                                     gfx::Point* transformed_point);
  37
  38  private:
  39   bool GetTargetSurfaceAtPointInternal(
  40       SurfaceId surface_id,
  41       const RenderPassId& render_pass_id,
  42       const gfx::Point& point_in_root_target,
  43       std::set<const RenderPass*>* referenced_passes,
  44       SurfaceId* out_surface_id,
  45       gfx::Point* out_transformed_point);
  46
  47   const RenderPass* GetRenderPassForSurfaceById(
  48       SurfaceId surface_id,
  49       const RenderPassId& render_pass_id);
  50
  51   bool PointInQuad(const DrawQuad* quad,
  52                    const gfx::Point& point_in_render_pass_space,
  53                    gfx::Point* point_in_quad_space);
  54
  55   SurfaceManager* const manager_;
  56 };
  57 }  // namespace cc
  58
  59 #endif  // CC_SURFACES_SURFACE_HITTEST_H_